Two serologically characteristic strains were included among the 251 strains of E. Coll O-124 which had been isolated by the author from 1953 to June, 1957.
The biochemical and serological properties of these two strains, i. e. No.41 and No.85 are reported in this paper.
The two strains were isolated from asymptomatic carriers in 1955 and their biochemical properties are shown in Tab. 1. Their somatic antigens were identical and the relationship of somatic antigens between the standard strain of O-124 and the two strains may be regarded as follows:
Standard strain: O-124a, 124b: B17
No.41 and No.85: O-124a, 124c: B17
A representative example of this relationship is shown in Tab. 2.
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